Hydroid Krasis
Creature — Jellyfish Hydra Beast
When you cast this spell, you gain half X life and draw half X cards. Round down each time.
Flying, trample
This creature enters with X +1/+1 counters on it.
- CMC
- 2
- Mana cost
- Color identity
- GU
- Rarity
- mythic
- Set
- Ravnica Allegiance Promos
- Price
- $0.91
- EDHREC rank
- #1516
Hydroid Krasis draws cards and gains life the moment you cast it — before it even resolves — making counterspells a losing trade for your opponent. The floor is a 1/1 flyer with trample for four mana; the ceiling, in a deck built around X-spells or infinite mana, is a game-ending haymaker that refills your hand in the same motion. Zimone, Infinite Analyst runs it in nearly every build for exactly that reason.
Best Commanders
Commanders with the highest synergy
Zimone, Infinite Analyst
Zimone, Infinite Analyst generates infinite mana as a core gameplan, and Hydroid Krasis converts that mana directly into a lethal flying body while drawing your entire deck as an uncounterable trigger — it's the cleanest finisher in the deck.
Zaxara, the Exemplary
Zaxara, the Exemplary creates a Hydra token every time you cast an X-spell, so Hydroid Krasis pulls double duty: it populates Zaxara's board while simultaneously refilling your hand and gaining life.
Magus Lucea Kane
Magus Lucea Kane copies spells with X in their cost, and a copied Hydroid Krasis doubles both the draw-and-lifegain trigger and the creature's size — one spell does the work of two.
Primo, the Unbounded
Primo, the Unbounded rewards big mana sinks, and Hydroid Krasis fits cleanly as both a mana dump and an immediate card-advantage engine that keeps the hand stocked for Primo's next activation.
The Goose Mother
The Goose Mother cares about having Food and generating value off large creatures, and Hydroid Krasis supplies a massive flying threat that pays for itself in cards on the way down.
Format Analysis
Where it lives, where it can’t
| Format | Verdict |
|---|---|
| commander | legal |
| legacy | legal |
| modern | legal |
| pioneer | legal |
| standard | not legal |
| vintage | legal |
| pauper | not legal |
| oathbreaker | legal |
Commander is where Hydroid Krasis earns its reputation — the format's slower pace and abundance of ramp let you cast it for X=6 or more regularly, and the cast trigger dodges the counterspells that would otherwise blank the investment. In Pioneer and Modern it sees fringe play as a value threat in ramp shells, though the four-mana floor is steep in faster metas where you rarely untap with it. Legacy and Vintage have enough broken infrastructure that Hydroid Krasis doesn't compete for those slots. Oathbreaker mirrors Commander closely enough that the same logic applies: if your signature spell generates mana, this is a natural top-end.
Key Combos
Combo lines featuring this card
Price Context
Current price
$0.91 bulk tier
At $0.91, Hydroid Krasis is bulk pricing for a card with genuine competitive history and a near-universal inclusion rate in its best Commander homes. That price is stable — widespread availability keeps the ceiling low, but the demand floor from Commander staple status means it won't sink further.
Explore
Sources
Mentioned
Updated . Data from Scryfall, EDHREC, and Commander Spellbook.